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Table 2 Association between rural Chinese couples’ sociodemographic characteristics and folic acid use

From: Socioeconomic inequality in periconceptional folic acid supplementation in China: a census of 0.9 million women in their first trimester of pregnancy

Husband

Wife

Number of Couples

N (%)

Use of folic acid

N (%)

Crude odds ratio

(95% CI)

Adjusted odds ratio (95% CI)

Age (years)

 21–29

21–29

525,524 (58.24)

399,650 (76.05)

1.00

1.00

30–39

19,367 (2.15)

14,609 (75.43)

0.97 (0.94,1.00)

0.97 (0.94,1.01)

40–49

119 (0.01)

86 (72.27)

0.82 (0.55,1.23)

1.12 (0.73,1.72)

 30–39

21–29

158,785 (17.6)

119,595 (75.32)

0.96 (0.95,0.97)

0.98 (0.96,0.99)

30–39

164,472 (18.23)

124,219 (75.53)

0.97 (0.96,0.99)

1.01 (0.98,1.03)

40–49

2775 (0.31)

1999 (72.04)

0.81 (0.75,0.88)

0.98 (0.88,1.08)

 40–49

21–29

3654 (0.4)

2605 (71.29)

0.78 (0.73,0.84)

0.84 (0.78,0.90)

30–39

18,367 (2.04)

13,270 (72.25)

0.82 (0.79,0.85)

0.93 (0.89,0.97)

40–49

9207 (1.02)

6282 (68.23)

0.68 (0.65,0.71)

0.81 (0.74,0.88)

Years of education

 ≤6

≤6

17,870 (2)

13,887 (77.71)

1.00

1.00

7–11

12,487 (1.4)

9417 (75.41)

0.88 (0.83,0.93)

0.91 (0.87,0.95)

≥12

2712 (0.3)

2075 (76.51)

0.93 (0.85,1.03)

0.89 (0.81,0.97)

 7–11

≤6

17,110 (1.92)

12,815 (74.90)

0.86 (0.82,0.90)

0.86 (0.82,0.91)

7–11

490,464 (55.02)

358,793 (73.15)

0.78 (0.75,0.81)

0.78 (0.77,0.80)

≥12

49,556 (5.56)

39,394 (79.49)

1.11 (1.07,1.16)

1.02 (1.00,1.05)

 ≥12

≤6

3412 (0.38)

2572 (75.38)

0.88 (0.81,0.96)

0.88 (0.81,0.96)

7–11

71,175 (7.98)

55,192 (77.54)

0.99 (0.95,1.03)

≥12

226,641 (25.42)

181,224 (79.96)

1.14 (1.10,1.19)

Occupation

 farmer

farmer

640,413 (72.42)

478,538 (74.72)

1.00

1.00

worker

5633 (0.64)

4125 (73.23)

0.93 (0.87,0.98)

0.71 (0.65,0.77)

others

9857 (1.11)

7787 (79.00)

1.27 (1.21,1.34)

0.97 (0.92,1.02)

 worker

farmer

18,104 (2.05)

14,063 (77.68)

1.18 (1.14,1.22)

1.08 (1.05,1.12)

worker

72,930 (8.25)

54,896 (75.27)

1.03 (1.01,1.05)

0.78 (0.73,0.82)

others

19,468 (2.2)

15,575 (80.00)

1.35 (1.31,1.40)

0.98 (0.94,1.02)

 others

farmer

14,873 (1.68)

12,044 (80.98)

1.44 (1.38,1.50)

1.29 (1.24,1.35)

worker

7783 (0.88)

6334 (81.38)

1.48 (1.40,1.57)

others

95,220 (10.77)

76,661 (80.51)

1.40 (1.37,1.42)